UV spectrograms of T Tauri stars.

The IUE satellite was used to observe the ultraviolet spectra of the T Tauri stars DR Tauri, CoD - 35 deg 10525, and AS 205. In addition, earlier IUE spectrograms of the T Tauri star S CrA were reduced using a more effective procedure. The IUE observations were supplemented by simultaneous groundbased observations. All observed UV spectra show emission lines of a great variety of different atoms and ions. The ion of highest ionization stage observed is N (V). Two of the observed T Tauri stars show a strong UV continuum and UV envelope absorption lines. The occurrence of such absorption lines and a strong UV continuum seems to be related to the envelope density of these objects. The observed ultraviolet spectra of DR Tau, CoD -35 deg 10525, and AS 205 and of S CrA are shown.